/*
 * Copyright 2009 Brian Mackay brianwmackay@msn.com
 *   All Rights Reserved. See end of file
 */
package com.bmackay.vonsteuben.client.files;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class LocalCacheFiles {

    private static LocalCacheFiles instance = null;
    private Map map = new ConcurrentHashMap();

    public static synchronized LocalCacheFiles getInstance() {
        if (instance == null) {
            instance = new LocalCacheFiles();
        }
        return instance;
    }

    public Object get(String key) {

        Object cachedValue = null;
        try {

            cachedValue = (Object) this.map.get(key);

        } catch (Exception e) {
            String message = e.getMessage();
            if (message == null) {
                message = e.getClass().getName();
            }
        }
        return cachedValue;
    }

    public void put(String key, Object value) {

        if (containsKey(key) == false) {
            this.map.put(key, value);
        }
    }

    public boolean containsKey(String key) {
        return this.map.containsKey(key);
    }

    public void remove(String key) {
        this.map.remove(key);
    }
}
/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */